hg: jdk9/sandbox/jdk: 8152704: jlink command line output/help message improvement

[chris.hegarty at oracle.com]

Changeset: 380afcaf1507
Author:    naoto
Date:      2016-03-29 17:06 -0700
URL:       http://hg.openjdk.java.net/jdk9/sandbox/jdk/rev/380afcaf1507

8152704: jlink command line output/help message improvement
Reviewed-by: mchung

! src/jdk.jlink/share/classes/jdk/tools/jlink/internal/ImageFileCreator.java
! src/jdk.jlink/share/classes/jdk/tools/jlink/internal/plugins/IncludeLocalesPlugin.java
! src/jdk.jlink/share/classes/jdk/tools/jlink/resources/plugins.properties
! test/tools/jlink/JLink2Test.java
! test/tools/jlink/plugins/IncludeLocalesPluginTest.java